通过分层镶嵌结构聚合物粘合剂的弹道离子传输

IF 30.8 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Defu Li, Chen Fang, Santosh Thapa, Hadas Sternlicht, Gi-Hyeok Lee, Faiz Ahmed, Xiuyu Jin, Qiusu Miao, Raynald Giovine, Wanli Yang, Andrew Minor, Yang-Tse Cheng and Gao Liu
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引用次数: 0

摘要

自20世纪70年代被发现以来,聚合物内的固态离子传导主要依赖于聚合物段运动来驱动离子扩散。然而,基于聚合物动力学的离子传输在室温下具有低离子电导率(通常为<;10−5 S cm−1),并且高度依赖于温度,温度通过控制聚合物中非晶与结晶成分的比例来影响性能。长期以来,人们一直在寻找一种独立于聚合物动力学的更快的离子传输机制,但仍然无法实现。在这里,我们报告了混合电子-离子导电(MEIC)聚合物粘合剂中的弹道离子传输机制,其层次有序的结构促进了离子扩散,并在- 20至70°C范围内实现了10−4至10−3 S cm−1的固态Li+电导率。这种机械坚固的MEIC聚合物是一种多功能离子导体,允许Li+, Na+或K+通过聚合物基体扩散,其阳离子电荷被共轭聚合物骨架上的电子抵消。传统的聚合物粘合剂通常被归类为非活性材料,因为它们的容量可以忽略不计。相比之下,这种聚合物粘合剂具有接近1000 mA h g−1的高Li+离子容量,将其转化为活性材料,并提供了一种提高能量密度的方法。本工作为具有超离子导电性、高电子导电性、高容量和机械坚固性的工程多功能聚合物粘合剂的设计原理奠定了基础和启发,从而扩展了其在固态能源领域的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Ballistic ion transport through hierarchically-ordered-structure polymer binder†

Ballistic ion transport through hierarchically-ordered-structure polymer binder†

Ballistic ion transport through hierarchically-ordered-structure polymer binder†

Since its discovery in the 1970s, solid-state ion conduction within polymers has primarily relied on polymer segmental motion to drive ion diffusion. However, ion transport based on polymer dynamics features low ionic conductivity (usually <10−5 S cm−1) at room temperature and highly depends on temperature, which influences performance by controlling the ratio of amorphous to crystalline composition in polymers. A faster ion transport mechanism, independent of polymer dynamics, has long been sought but remains inaccessible. Here, we report a ballistic ion transport mechanism in a mixed electronic-ionic conductive (MEIC) polymer binder, where its hierarchically ordered structure facilitates ion diffusion and achieves solid-state Li+ conductivity in the range of 10−4 to 10−3 S cm−1 from −20 to 70 °C. This mechanically robust MEIC polymer is a versatile ionic conductor, allowing Li+, Na+, or K+ to diffuse through the polymer matrix, with their cationic charges counterbalanced by electrons on conjugated polymer backbones. Traditional polymer binders have typically been classified as inactive materials due to their negligible capacity. In contrast, this polymer binder features a high Li+ ion capacity of nearly 1000 mA h g−1, transforming it into an active material and providing a method to enhance energy density. This work establishes a foundation and inspires a design principle for engineering multifunctional polymer binders with superionic conductivity, high electronic conductivity, high capacity, and mechanical robustness, thereby extending their applications in the field of solid-state energy.

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来源期刊
Energy & Environmental Science
Energy & Environmental Science 化学-工程:化工
CiteScore
50.50
自引率
2.20%
发文量
349
审稿时长
2.2 months
期刊介绍: Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences." Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).
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